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United States Patent | 5,341,343 |
Aske | August 23, 1994 |
An explosive actuated acoustic device emits sound to be used in torpedo countermeasures. Numbered devices are delivered over an extended area and sink through the water. The devices are actuated at different times as they sink, to provide sound masking over an extended period of time. The devices also include safety devices which prevent premature actuation from jarring or jolting and from impact with the water.
Inventors: | Aske; Robert L. (St. Louis Park, MN) |
Assignee: | Alliant Techsystems, Inc. (Edina, MN) |
Appl. No.: | 041560 |
Filed: | April 2, 1993 |
Current U.S. Class: | 367/1; 102/393; 102/394; 181/116; 181/118; 367/145 |
Intern'l Class: | H04K 003/00 |
Field of Search: | 367/1,145 181/116,118 102/393,394,402 89/1.1,1.11 |
3938438 | Feb., 1976 | Anderson et al. | 102/393. |
4183302 | Jan., 1980 | Schillreff | 367/1. |
4633969 | Jan., 1987 | Palmer | 367/145. |
4975890 | Dec., 1990 | Wolf et al. | 367/145. |
5003515 | Mar., 1991 | Will et al. | 367/145. |
5175712 | Dec., 1992 | Vaccaro et al. | 367/145. |
Excerpt on the ADC MK2 MOD O, by Bernard Blake, Jane's Underwater Warfare Systems, p. 1., 1989-1990. Excerpt on the Sonar 2066 Bandfish, by Bernard Blake, Jane's Underwater Warfare Systems, p. 1., 1989-1990. |